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HP is aware of the recent vulnerabilities commonly referred to as "Spectre" and "Meltdown". HP has published a security bulletin with patches for these issues and a list of impacted systems. We will continue to update the bulletin as more information becomes available and encourage customers to check the bulletin frequently.

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Identical memory components are used to build the CTO configurations as are available as After Market Options (AMO). The AMO Option Kit Part # are shown alongside the memory DIMMs.

For details on the supported memory configurations on the HP Z840 Workstation, please refer to the System Technical Specifications - System Board section of this document.

DIMMs should be equally distributed across all four memory channels for optimal performance.

Each processor supports up to 4 channels of DDR4 memory. To realize full performance at least 1 DIMM must be inserted into each channel.

The CPUs determine the speed at which the memory is clocked. For example, if a 1600MHz capable CPU is used in the system, the maximum speed the memory will run at is 1600MHz regardless of the specified speed of the memory.

You cannot intermix LR DIMMs with Registered DIMMs. The system will not work.

Maximum memory capacities assume Windows 64-bit operating systems or Linux. With Windows 32-bit operating systems, memory above 3 GB may not all be available due to system resources.

Networking/Communications

HP X520 10GbE Dual Port Adapter

HP 10GbE SFP+ SR Transceiver

Intel Ethernet I210-T1 PCIe NIC

Intel 7260 802.11 a/b/g/n PCIe WLAN NIC

Integrated Intel I210AT PCIe GbE Controller

Integrated Intel I218LM PCIe GbE Controller

HP 361T PCIe Dual Port Gigabit NIC

note:

"Gigabit" or "GbE" Ethernet indicates compliance with IEEE standard 802.3ab for Gigabit Ethernet, and does not connote actual operating speed of 1 Gb/sec. For high speed transmission, connection to a Gigabit Ethernet server and network infrastructure is required.

*Wireless access point and internet service required. Availability of public wireless access points limited.

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* Not all features are available in all editions or versions of Windows. Systems may require upgraded and/or separately purchased hardware, drivers and/or software to take full advantage of Windows functionality.

** This system is preinstalled with Windows® 7 Pro software and also comes with a license and media for Windows 8.1 Pro software. You may only use one version of the Windows software at a time. Switching between versions will require you to uninstall one version and install the other version. You must back up all data (files, photos, etc.) before uninstalling and installing operating systems to avoid loss of your data.

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1 This second OS must be ordered with the HP Linux Installer Kit as the first OS.